Electric bell.



J F. RODGERS.

ELECTRIC BELL.

APPLICATION FILED MAR.23, 191a.

Patented Dec. 31, 1918.

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INVE/VTUR John 1 fiadgens WITNESSES 4 TTORNEYS JOHN F. RODGERS, 0F BROOKLYN, NEW YORK.

ELECTRIC BELL.

Specification of Letters'latent.

Patented Dec. 311, 191th Application filed. March 23, 1918. Serial No. 224,275.

To all whom it may concern:

Be it known that 1, JOHN F. RODGERS, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New; York, have invented a new and Improved Electric Bell, of which the following is a full, clear, and exact description.

The invention relates to electric bells in which the movable core of a solenoid is used as a striker for sounding the bell.

The object of the invention is to provide a new and improved electric bell provided with a simple arrangement for making and breaking the circuit when the coil is energized thus insuring proper working of the striker core. Another object is to simplify the construction of the electric bell with a view to permit of cheaply manufacturing it and provide but few parts not liable to get easily out of order.

With these and other objects in view, the invention consists of certain novel features of construction, as hereinafter shown and described and then specifically pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a sectional front elevation of the electric bell on the line 1-1 of Fig. 2;

' Fig. 2 is a cross section of the same on the line 2=2 of Fig. 1; and

Fig. 3 is an enlarged cross section of the circuit making and breaking lever and its spring for holding the lever in raised position during the initial descent of the core.

On the casing 10 of an electric bell is mounted a gong 11 adapted to be sounded by the head 12 of a core 13 slidable u and down in the coil 14 of a solenoid he d insulated on the casing 10, as plainly indicated in the drawings. The core'13 is made hollow and projects below the coil 14 and on the lower end is held, a transversely extending pin 15 engaging an elongated openin 16 formed in the 'free end of a circuit ma ing and breaking lever 17 mounted to swing on a stud 18 attached to the frame 10. The lever 17 extends through a vertical slot 19 formed in one side of the core 13, as plainly indicated in Figs. 1 and 2. The lever 17 is provided with a contact spring 20 adapted 16 until it reaches the lower end to engage a contact 21 in the form of a screw adjustably heldin a bracket 22 attached to the casing 10. A Wire 25 connects the bracket 22 with a binding post 26 mounted on the frame 10 which also supports another binding post 27 connected by a wire 28 with the coil 14, which latter is also connected by a wire 29 [with the-circuit making and breaking lever 17. The binding posts 26 and 27 are connected in the usual manner with a source of electrical energy, and a switch (not shown) is arranged 1n the circuit between the binding posts 26 and 27 and the source-of electrical energy so that when the switch is closed an electric current passes by way of the binding post 27, wire 28, coil 14, wire 29, circuit making and breaking lever 17, spring 20, contact-21, bracket 22 and wire 25 to the other binding post 26 so that the coil 14 is energized and the core 13 is caused to slide upward in the coil 14 whereby the head 12 is caused to strike the bell 11 to sound the same. During this upward movement of the core 13 the pin 15 moves upward in the opening 16 and when it reaches the vKipper end thereof it imparts an upward swinging motion to the circuit making and breaking lever 17 whereby the spring 20 is moved out of engagement with the contact 21 to break the circuit. When this takes place the coil 14: is deenergized and the core 13 now drops by its own .weight, and the pin 15 now moves downward in the opening thereof to impart a downwardswinging movement to the circuit making and breaklng lever 17 to reengage the contact sprin 20 with the contact 21. The above descrlbed operation is then repeated, that is, the coil 14 is re'nergized and a second upward movement of the core 13 takes place to strike the bell 11 a second time and to move the spring 20 out of engagement with the contact 21 to again break the circuit. This operation is repeated as longas the main switch is kept closed.

In order to hold the circuit making and ,breaking lever 17 in uppermost position, use is madeof'a tension spring 80 coiled on the stud 18 and pressing with one end against the pivotal. end of the circuit making and breaking lever 17 tohold the latter in frictional contact with a washer 31 held on the stud 18. The outer end of the spring 30 is engaged by a nut 32 screwing on the outer threaded end of the stud 18 to permitthe user to regulate the tension of the spring 30 with a view to press the lever 17 in contact with the washer 31 to hold the lever 17 in 17 to swing downward on the pin 15 'engag-- ing the bottom of the opening 16. lhe outer end of the stud 18 is preferably split, as indicated in 3, to hold the nut 32 in the adjusted position.

The lever 17 is provided with an arm 40 on which a weight 41 is adjustably secured by the use of a set crew 42. By this arrangement the contact spring-is caused to make a proper contact with the contact 21.

From the foregoing it will be seen that by the arrangement described a deviceis provided for making and breaking the circuit when the coil is alternately energized and deenergized, thus insuring proper work of the combined striker and core 13.-

It will also be noticed that the electric bell is made of comparatively few parts, not liable to get easily out of order.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent 1. In an electric bell, a solenoid having its movable core forming the striker for the bell, the core being hollow and provided with a side opening, a in carried by the said core, a circuit making and" breaking lever extending through the" said side opening and having an elongated opening engaged by the said pin,'a spring engaging the said lever, anda fixed contact adapted to be engaged by the said spring.

2. In an electric bell, a solenoid having its movable core forming the striker for the bell, the core being'hollow, and provided with a side opening, a pin carried by the said core, a circuit making and breaking lever extending through the said side opening and having an elongated opening engaged by the said pin, a spring engaging the said lever, means for regulating the tension of the said spring, and .a fixed contact adapted to be engaged by the said lever.

JOHN F. RODGERS. 

